CN204203363U - A kind of electric resistance measuring apparatus - Google Patents
A kind of electric resistance measuring apparatus Download PDFInfo
- Publication number
- CN204203363U CN204203363U CN201420534284.8U CN201420534284U CN204203363U CN 204203363 U CN204203363 U CN 204203363U CN 201420534284 U CN201420534284 U CN 201420534284U CN 204203363 U CN204203363 U CN 204203363U
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- CN
- China
- Prior art keywords
- nanovoltmeter
- current source
- measuring apparatus
- electric resistance
- resistance
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- Expired - Lifetime
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- 238000005259 measurement Methods 0.000 description 15
- 238000012360 testing method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model discloses a kind of electric resistance measuring apparatus to comprise: computing machine, current source, nanovoltmeter; Described computing machine is connected respectively with current source and nanovoltmeter; Described nanovoltmeter and measured piece form loop; Described current source and measured piece form loop.
Description
Technical field
The utility model relates to resistance measurement field, particularly a kind of low resistance precision measurement apparatus.
Background technology
At electricity field, the measurement application of direct current resistance is extremely extensive, and resistance measurement scope is 10
-6~ 10
12ohm is even larger; Measuring object can be ratings is metric resistance, also can be non-decimal resistance; In addition, measure can in the consumption of big current measured resistance hectowatt power under carry out, also can carry out under small area analysis Micro Energy Lose, also can under high pressure carry out.The variation of Measuring DC Resistance and measuring circuit of these different Determines.
Current, resistance precision measurement mainly adopts classical Kelvin's four-wire ohm measuring principle.This principle large-scale application is in all kinds of digital micro-OHM meter, and Estimate of Resistance for DC Low Resistance tester, in digital electric bridge and cable tester.Although all have employed Kelvin's four-wire ohm measuring principle, for different measuring methods, also can there is very large difference in its accuracy of measurement.Adopt different measuring methods, thermoelectrical potential, contact resistance and the noise impact on measurement result in its measurement is not identical.In low-resistance measurement, the impact on the precision that resistance is measured of thermoelectrical potential, contact resistance and noise is very large.
Utility model content
The problem that the utility model solves is that existing electric resistance measuring apparatus measuring accuracy is large by thermoelectrical potential, contact resistance and noise effect; For solving described problem, the utility model provides a kind of electric resistance measuring apparatus.
The resistance testing device that the utility model provides comprises: computing machine, current source, nanovoltmeter; Described computing machine is connected respectively with current source and nanovoltmeter; Described nanovoltmeter and measured piece form loop; Described current source and measured piece form loop.
Further, described computing machine is connected by gpib interface card and LAN bus with current source.
Further, described computing machine is connected by gpib interface card and RS232 bus with nanovoltmeter.
Further, described current source is connected by 2600-TLINK with nanovoltmeter.
Further, described current source adopts 2651A type Precision Current Component.
Further, described nanovoltmeter adopts 2182A type nanovoltmeter.
Low resistance precision measurement apparatus provided by the utility model, effectively can eliminate the impact on precise measurement results of thermoelectrical potential in low-resistance measurement, contact resistance and noise, farthest decrease the test duration, reduce the probability producing error, there is accuracy of measurement high, the fast and low noise advantages of test speed.
Accompanying drawing explanation
Fig. 1 is the result schematic diagram of electric resistance measuring apparatus provided by the utility model.
Embodiment
Hereinafter, in conjunction with the accompanying drawings and embodiments the utility model is further elaborated.
Applicants studied lead resistance, non-ohmic contact and device heats problem in low resistance test, analyze source of error and the characteristic of main existence in low-resistance measurement process, and for the Crack cause of different error sources and characteristic, technical side's bill of research error concealment.
Applicant thinks that the size of typical wire resistance is in the scope of 10 ~ 100m Ω, when testing resistance is lower than 10 ~ 100 Ω, four lines (i.e. Kelvin) method of attachment is adopted to be more suitable for low-resistance measurement, and the voltage drop in detection leads also can be ignored, the resistance value therefore recorded in this way is more accurate.But when circuit different piece is in different temperature, and when the conductor be made up of different materials links together, thermoelectric voltage and EMF will be produced.
as shown in Figure 1, the resistance testing device that the utility model provides comprises: computing machine 01, current source 02, nanovoltmeter 03; Described computing machine 01 is connected respectively with current source 02 and nanovoltmeter 03; Described nanovoltmeter 03 forms loop with measured piece 04; Described current source 02 forms loop with measured piece 04.
Continue with reference to figure 1, in utility model of the present utility model, described computing machine 01 is connected by gpib interface card and LAN bus 05 with current source 02; Described computing machine 01 is connected by gpib interface card and RS232 bus 03 with nanovoltmeter 03.Described current source 02 is connected by 2600-TLINK with nanovoltmeter 03.Described current source 02 adopts 2651A type Precision Current Component; Described nanovoltmeter 03 adopts 2182A type nanovoltmeter.
Although the utility model with preferred embodiment openly as above; but it is not for limiting the utility model; any those skilled in the art are not departing from spirit and scope of the present utility model; the Method and Technology content of above-mentioned announcement can be utilized to make possible variation and amendment to technical solutions of the utility model; therefore; every content not departing from technical solutions of the utility model; the any simple modification done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all belong to the protection domain of technical solutions of the utility model.
Claims (6)
1. an electric resistance measuring apparatus, is characterized in that, comprising: computing machine, current source, nanovoltmeter; Described computing machine is connected respectively with current source and nanovoltmeter; Described nanovoltmeter and measured piece form loop; Described current source and measured piece form loop.
2. according to electric resistance measuring apparatus according to claim 1, it is characterized in that, described computing machine is connected by gpib interface card and LAN bus with current source.
3. according to electric resistance measuring apparatus according to claim 1, it is characterized in that, described computing machine is connected by gpib interface card and RS232 bus with nanovoltmeter.
4. according to electric resistance measuring apparatus according to claim 1, it is characterized in that, described current source is connected by 2600-TLINK with nanovoltmeter.
5. according to electric resistance measuring apparatus according to claim 1, it is characterized in that, described current source adopts 2651A type Precision Current Component.
6. according to electric resistance measuring apparatus according to claim 1, it is characterized in that, described nanovoltmeter adopts 2182A type nanovoltmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420534284.8U CN204203363U (en) | 2014-09-17 | 2014-09-17 | A kind of electric resistance measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420534284.8U CN204203363U (en) | 2014-09-17 | 2014-09-17 | A kind of electric resistance measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204203363U true CN204203363U (en) | 2015-03-11 |
Family
ID=52661308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420534284.8U Expired - Lifetime CN204203363U (en) | 2014-09-17 | 2014-09-17 | A kind of electric resistance measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204203363U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051648A (en) * | 2017-12-01 | 2018-05-18 | 西安交通大学 | A kind of material electromagnetic attributes measuring method based on DC potential and detection method of eddy |
| CN109387698A (en) * | 2017-08-04 | 2019-02-26 | 常州轻工职业技术学院 | A kind of measuring device and its method of plate resistance |
-
2014
- 2014-09-17 CN CN201420534284.8U patent/CN204203363U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387698A (en) * | 2017-08-04 | 2019-02-26 | 常州轻工职业技术学院 | A kind of measuring device and its method of plate resistance |
| CN109387698B (en) * | 2017-08-04 | 2021-01-29 | 常州轻工职业技术学院 | Device and method for measuring sheet resistance |
| CN108051648A (en) * | 2017-12-01 | 2018-05-18 | 西安交通大学 | A kind of material electromagnetic attributes measuring method based on DC potential and detection method of eddy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150311 |